The flattening model and small detachment structure of the Ukrainian army, the actual combat test is very successful.
The Ukrainian army is mainly formed by battalions, and there are many independent tactical squads below, generally in groups of seven or eight, by two or three vehicles, with a very clear division of labor inside, 1 organic gunner, 2 snipers, 1 "Stinger" anti-aircraft missile shooter, 1 Javelin anti-tank missile shooter, and 2-3 other combatants.
Although these detachments are small, they can fight both positional warfare and ambush warfare, and the key is to organize air defense and anti-tank strikes. What if the Russian army comes? One word: run.
The command of the squad is issued by the command center, and the information of the command center comes from multiple levels, especially some of the information is provided by NATO's spy satellites, which perceive the battlefield situation in advance. Squads can upload information in a timely manner, and squads can exchange information with each other. Thus the small detachments of the Ukrainian army can attack Russian targets on an improvised basis, and can retreat at any time even if they cannot win.